I found this site while looking for information on QE II banknotes.
www.pjsymes.com.au
It has a compete description of all the images of the Queen on banknotes of the world.
There are 31 images described with details of engraver variants.
There are 33 nations that issued notes with the Queen on them.
It gives the sources for the engraved images, photos or paintings. It describes the jewelry she is wearing and sometimes the clothes.
It is the best site I found and very comprehensive.
Peter Symes is a numismatic researcher with many publications.